<!DOCTYPE html>
<html lang="zh">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .red {
      color: red;
    }

    .yellow {
      color: yellow;
    }

    .pink {
      color: pink;
    }

    .big {
      font-size: 30px;
    }
  </style>
</head>

<body>
  <p class="red big">小红</p>
  <p class="yellow">小黄</p>
  <p class="pink">小粉</p>
</body>

</html>